Gas broiler



DOWD GAS BROILER H. WO

April 2, 1929.

` 2 sheets-sheet Filed Dec. 51, 1925 INVENTOR 4325 ze 32 a 3@ April 2, 1929. H, W QDOWD 1,707,276

GAS BROILER v Filed Dec. 3l, 1925 2 Sheets-Sheet E /y'l INVENTORv BY @y lili ll.

IT ED STT E l.;

ortica,

HENRY W.. OlO-WIL,` 0F JERSEY CITY, NEW JERSEY, ASSIGNOR T0 STANDARD GAS EQUIPMENT CORPORATIQN, A CORPORATION 0F MARYLAND.

eas morena.

'llhe invention relates, more particularly, to gas broilers,ltoasters, and the like, in which the heat from the dame jets is directed downwardly upon the material to be treated.

A common form of gas broiler, is made with an oblong open-faced broiling chamber in which, along the opposite upper sides, extend Bunsen burner tubes having pipes branching laterally therefrom across the upper part of the broiling chamber. branch pipes are formed with dame ports in their lower sides from which the dame jets extend downwardly toward .the grid on which is placed the food to be broiled.

A gas broiler constructed in the manner of the art, as above described, has certain serious inherent defects. The branch pipes rwarp; deleterious matter, as oxide of iron daked from the pipes, and moisture of condensation, falls upon the cooking food; and, moreover, secondary air to support combustion is not supplied in a proper manner or quantity.. These and other defects will be apparent to those skilled in the art.

With the foregoing defects in view, theA present invention provides a construction of gas broiler or other gas apparatus of similar operation,` in ,which the burner tubes are located at thel opposite upper "sides of the broiling' chamber outside lthe zone of the grid. Within said zone and directly over the grid is sustained a heat deflecting ele-v ment which radiates and deflects downwardciated with each burner tube and the heat delect'ing element a burner plate formed with secondary air discharge openings adjacentthe llame ports of the bdurner tube.

The foregoing "construction issuch, also,

as -to lend itself' to other advantageous features which will be brought out in the following description of Jthe construction and arrangement of the parts of a preferred embodiment of the invention.

' Of the accompanying drawings:

Fig-1 is a front view, partly in sectlon,

. of the upper part of a gas range showing at Y' ecting memberfburner tube, and burner These ly the heat from the flame jets sent into sardzone by the lburner tubes, )and there is asso- Fig. 3 isa perspective view of a'heat-deand baiHe plates, parts being broken away,

showing the relative dispositionk and arrangement thereof; l

Fig. l is a side view of a burner tube, showing its laterally disposed dame ports,v and indicating by the dotted lines the method of removing the same from the range; and

Fig. 5 is a top plan View of a gas broiler, parts being broken away, illustrating a modification ofthe burner unit. Y

Referringfin detail to the drawings, and first to Figs. l to 3, inclusive, there is illustrated therein a gas broiler or toaster, having its heating parts `made in accordance with the invention. The broiler is made in the conventional casing of oblong form, a frame 7 forming an open front. A partition 8 forms a rear wall for the broiling cham- 'ber 9 and extends parallel with the rear wall the broilingchamberfabove the food, such as vwarping of the tubes, inaccessibility for cleaning, and the dropping of deleterious matter upon the cooking food, said tubes are disposed Ioutside the zone ofthe grid in the upper part of the broiling chamber along the opposite sides thereof, see Fig. 2. Said tubes have on their rear ends ears 16 adapted to rest on brackets 17fsecured to'said partition 8. At their front ends said tubes rest on the frame 7 andhave depending portions 18 ending in the customary air chambers 19.

Gas is supplied from pipes 20, having cocks 21, and leading from a manifold .22. It will be seen, see Figs. 2 and 4, that this constructionA affords the advantage, -according to onel feature of the invention, that by slightly lifting the tubes at their outer ends they may be purpose, as for cleaning or replacing. On their inner sides said tubes 13, 14 are formed with flame ports 23 laterally and inwardly directed. In operation, the llame jets "from the burner ports will be made to reach horizontally nearl to the vertical center of the broilingcham er 9.

rlhe food to be cooked is placed upon 'a grid 2 4, which may be located in the broiling chamber at a convenient level below the gas tubes 13, 14 by means of supporting side ledges 25. AIn order that the heat from horizontal bracket 28 having a depending flange 29 is secured to the wall'S by screws 31. f At the front of the chamber 9 a flange 32 of the frame '7 projects inwardlv. A

supporting member 33 is laid on the biacket 2 8 and flange 32 centrally thereof and is secured to the bracket 28 by screws 34. This member 33 is cast with a central rib 36, dividing the upper part of the broiler into two flue compartments. Battle plates 37,

38 are secured to the bracket 28 and flange with proper combustion, It will be seen` that in the construction thus formed ad- 32 near `their outer ends but inwardly of the burner tubes 13, 14, being fastened to the bracket 28 by screws 39. These baffle plates will be hereinafter further described. On Athe framework thus outlined are Ilaid the deflector members 26, 27, their, inner edges, which are spaced apart, forming with said rib 36 passages 41, 42 to which further allusion will presently be made. As shown in Figs. 1 and 2, said delectors extend from the front frame 7 of the casing to the rear Wall 8 of the broiling chamber and from the supporting member 33 nearly vto the .respective gas tubes 13, 14. It will be noted that said deflector members may be readily removed through the front of the casing, a lid 43, provided with handles 44,I being slidable vertically in the upper part of the frame 7 in a conventional manner and tlnsA permitting such removal, see Figs. 1 an 2.`

The flame jets from the flame ports 23 will pl'ayhorizontally' under said deflectors throughout their entire extent and, in order to promote perfect combustion, ribs-46 dep'end from the under sides of the deflectors' between thel several flames, forming grooves which nregister with the flame ports 23. These grooves in effect form separate combustion chambers for the respective flame jets.l `The lheated' products of combustion will 'pass out of said chambers into the passages'4l, 42 and thence back to a chimney 47 rising from the rear center of the top of the casing. The rib 36, besides serving .as a wall for said passagesv 41, 42, prevents any meeting and commingling of the heated products of combustion coming from opposite directions and any `disturbances re.- sulting therefrom which would interfere verse currents and eddies in the flow of the' heated products of combustion will be prevented, complete combustion thus promoted, and the heat from the flame jets will be deflected downwardly upon the food being broiled. Further to increase the heating efficiency of the broiler, the dellecting members 26, 27 are made of suitable incandescing material which will be heated to incandescence by contact with the flame jets, and in turn these incandescent deflectors will radiale heat down upon the grid containing the food to be broiled. The ribs 46 in addition. to their function in forming combustion chambers forthe flame jets serve also to increase the reflecting and radiating surfaces of thedeflecting members. These surfacesy are yet further increased by protuberances 48 which may be of any suitable size and shape' but which do not depend low enough ,to interfere with the flame jets.

It is desirable that the heat should be deflected and radiated down upon the grid containing the food, being broiled evenly and equally throughout the,length of the flame jets. As, however, the heat efficiency of the flame'jets is greater near the beginnings or stems thereof,isaid baille plates 37, 38 are provided, extending from the flame ports a suitable distance under the fibs 46 and so serving to check the downward flow of the heat at the place of its greatest strength, and to send some of this heat forward. In order, however, that the heat may not thus be checked in too great a degree, :said vplates 37, 38 are formed with perforations 49 so proportioned that the proper amount of heat will be permitted to pass the baille plates. It may be noted,

also, that the closed top of the broiler will absorb the heat from the outflowing heated products of combustion and will likewise rece vesome heatby radiation` from the heat deflecting members, all in such degree as to be useful in keeping warm any articles already heated and placed on said' top.

It is to be observed that as the flame jets mustrbe of great length, less than the ordima? amount of primary air should be mixed wit the gas. In order, therefore, to develop flame jets capable of giving off the requned quantity of` heat, secondary air must be.su plied in volume properly proportioned to t e low intake of primary air and at a proper time and 'in a proper manner. For this purpose, therefore, there is providedbetween the`flameports 23 and the adjacent edges Yof the deflectors 26, 27 and extending from the baille plates 37 to the top of the casing and from thefront of the broiling chamber to the rear wall 8 thereof, burner plates 51 which may be conveniently formed as vertical flanges of the baffle plates 37. These burner plates l51 are formed with menare secondary air discharge openings 553 adjacentv the dame ports 23 and et greater diameter. lit will be seen that by reason vof the construction thus described secondary air will be supplied to the 'Flame jets at their stems from above as well las below. llt isV to be noted, also, that as the iiame jets are spacedapart troni the roofs of the grooves, in their passage therethrouglil they will be supplied from above with such further secondary air as they need.

di, modiiication et the invention is shown in Fig. 5, the gas broiler in this instance being provided with a burneyi unit so constructed and arranged as to be capable of use as a whole or in either its front or rear parts separately. The casing ofthe broiler is similar to the casing heretofore described,

but one heat-deflecting member 26 is pref erably provided instead of two as in the prior construction. To support the detlec'tor a framework general y similar to that heretofore described is pi ovided, the parts being similarly numbered, slee Fig. 5, adding in each instance the exponent 21, the central supporting member 33 `being omitted. Burner tubes 13, 1liLL are located andremovably mounted as in theother construction. 'lhese burners, however, are provided each with tiaine ports 23a for half its length and in opposite halves, that is to say, one tube, say 13, is provided with fiame ports in its forward half, while the other tube 14;a has' them. in its rearward half, as shown in said Fig. 5. It will be seen, therefore, that it only one burner tube is operated,only that part of the heat dellector 268L will be heated to incandescence which is immediately opposite the flame ports being used.- l/Vith the construction thus shown and described, however, the broiling may be done in either the forwarder rear part of the broiling chamber, as may be desirable, withI a consequent economy in operation. And if occasion require, the heat deflector 26 ma be utilized to its' full capacit by using both burner tubes 13, 14. It s ould be noted that the flame jets in this construction will. extend throughout 'substantially the entire length of the grooves or combusion chambers and the heated products of combustion will pass through them, being given an upward direction by the burner plate 51a and curling over the top of the heatdelector to flow to thechimney (not vshown in said Fig. `5) rising from the rear center of the casing top. It should be noted, also, that the burner plates 51u inV this case are formed' without'v any secondary air discharge openings 52 in those parts where the said heated roducts of combustion pass, whereby no iversion of said is permitted.

The invention in its broader aspects is not limited to the precise constructions shown products from their proper path in the details thereof without departing,

trom the main principles of the invention or sacriiicing its chief advantages.

Having thus described my invention, what l claim is:

1. lin a gas broiler, the combination of a casing, a burner therein formed with laterally directed flame ports, a heat deilector sustained laterally adjacent said flame ports, and a baffle plate extending under the edge portion only 'of the deiector'adjacent tie iame ports, whereby the heat is defiected downwardly in uniform degree throughout the length of the Hame jets.

2. A gas burner unit comprising a pair o tubes, each tube having inwardly directed Hame ports in a plart thereof and a blank part, and said tubes being arranged with the iiame ports ot one tube opposite the blank part and its iiame ports restricted to the rear part of the easing.

5. In a gas broiler, the combina-tion of a Lburner formed with laterally directed flame ports, and a heat deflector composed of a' slab of refractory material formed with grooves, the body of said slab being arranged above the level of said flame ports and said grooves being aligned with the flame ports to constitute combustion chambers for the.)

individual fla-me jets, and said deflector being arranged to radiate the heat downwardly directly upon the article to be heated.

6.- In a gas broiler, the `combination of a burner formed with laterally directed iame ports, and a heat deflectr composed of a slab of refractor material sustained laterally adjaent an with its body ,portion arranged a ove the level of the ame ports and formed with depending ribs forming grooves alined with the flame ports and which constitute combustion chambers for the individual flame jets, and said deflector being arranged to radiate the heat downlvvazrdy directly upon the article to be heated.

a gas broiler, the combination of a burner formed with laterally directed flame ports, and a heat deflector composed 'of a slab of refractory material sustained laterv ally adjacent and abve the level of the flame ports and former with grooves alined with the flame ports to constitute combustion chambers for(i the individual flame jets, said deflector beine arranged to radiate the heat downwardly directly upon the article to be and formed with depending ribs'forming.

grooves alined with the flame ports and wluch constitute combustion chambers for the individual flame jets, said delector being arranged to radiate the heat downwardly directly upon the article to be heated, and means\associat'ed with said burner for regulating the supply of secondary air to the upper sides of the flame jets.

9. In a gas broiler, the combination of a casing, a,l burner tube extending fore-andaft of the casing and formed with laterally directedflame ports, a heat deflector sustained laterally adjacent and with its body portion above the flame portsand arranged,

to defiect downwardly heat from the flame jets directly upon the article to be heated,

and a burner plate disposedr between the burner and heat deflector and formed with secondary air discharge openings therein adjacent the llame ports, thru which openings secondary air is supplied to the upper sides of the flame jets.

10. In a gas heating apparatus, the combination of' a casing, a pair of burner tubes arranged in said casing at the opposite sides thereof, each tube having inwardly directed flame ports in a part thereof and a blank part, said tubes being arranged with the flame ports of one tube opposite the blank part of' the other tube, a heat deflector arranged lmrizontally between said tubes and with its body portion above the level of said flame ports, a burner plate disposed between each burner tube and the adjacent edge of the heat deflector and formed with secondary air discharge openings therein opposite the flame ports, and a blank portion opposite the blank portion of the adjacent burner, whereby heated products of combustion will pass the blank part of said plate without diversion from their proper path.

In testimony whereof, I have affixed my signature hereto.

HENRY w. onown. 

